PMID- 20661619
OWN - NLM
STAT- MEDLINE
DCOM- 20101124
LR  - 20211020
IS  - 1292-895X (Electronic)
IS  - 1292-8941 (Linking)
VI  - 32
IP  - 3
DP  - 2010 Jul
TI  - Alternating current electrical conductivity of high-density polyethylene-carbon 
      nanofiber composites.
PG  - 249-54
LID - 10.1140/epje/i2010-10648-5 [doi]
AB  - High-density polyethylene (HDPE)-carbon nanofiber (CNF) composites with good 
      dispersion of fillers in the polymer matrix were melt-compounded in a Haake 
      mixer. The dependences of the alternating current conductivity of such 
      nanocomposites on the filler content, temperature, and DC bias were investigated. 
      The results showed that the electrical conducting behavior of HDPE-CNF 
      nanocomposites can be well characterized by the direct current conductivity 
      (sigmaDC, characteristic frequency (fc) and critical exponent (s). It was found 
      that sigmaDC of percolating HDPE-CNF nanocomposites increases with increasing 
      filler concentration and follows the scaling law of percolation theory. 
      Increasing temperature caused a reduction of sigmaDC, leading to the occurrence 
      of positive-temperature-coefficient effect near the melting temperature of HDPE 
      matrix. Application of DC bias led to an increase of sigmaDC due to the creation 
      of additional conducting paths within the polymer composites. The characteristic 
      frequency generally followed the same tendency as sigmaDC. The s values of 
      percolating composites were slightly higher than those predicted by the 
      percolation theory, indicating the presence of tunneling or hopping conduction in 
      these composites.
FAU - He, L-X
AU  - He LX
AD  - Department of Physics and Materials Science, City University of Hong Kong, 
      Kowloon, Hong Kong.
FAU - Tjong, S-C
AU  - Tjong SC
LA  - eng
PT  - Journal Article
PT  - Research Support, Non-U.S. Gov't
DEP - 20100727
PL  - France
TA  - Eur Phys J E Soft Matter
JT  - The European physical journal. E, Soft matter
JID - 101126530
RN  - 7440-44-0 (Carbon)
RN  - 9002-88-4 (Polyethylene)
SB  - IM
MH  - Carbon/*chemistry
MH  - *Electric Conductivity
MH  - Models, Theoretical
MH  - Nanocomposites/*chemistry
MH  - Nanofibers/*chemistry
MH  - Polyethylene/*chemistry
MH  - Transition Temperature
EDAT- 2010/07/28 06:00
MHDA- 2010/12/14 06:00
CRDT- 2010/07/28 06:00
PHST- 2010/03/22 00:00 [received]
PHST- 2010/06/15 00:00 [accepted]
PHST- 2010/07/28 06:00 [entrez]
PHST- 2010/07/28 06:00 [pubmed]
PHST- 2010/12/14 06:00 [medline]
AID - 10.1140/epje/i2010-10648-5 [doi]
PST - ppublish
SO  - Eur Phys J E Soft Matter. 2010 Jul;32(3):249-54. doi: 10.1140/epje/i2010-10648-5. 
      Epub 2010 Jul 27.